COMPLEX SURFACES ANALYSIS OBTAINED THROUGH THE MILLING PROCESS
Felipe Gustavo Ebersbach1; Janaina Geisler Corrêa1; Rolf Bertrand Schroeter1
1 Federal University of Santa Catarina
doi:10.20906/CPS/COB-2015-1079
Resumo
In the milling process, the finishing stage of a complex surface is usually performed by a ball nose end mill that does not present a constant contact area, creating a non-uniform roughness which hinders productivity. This work aims to evaluate the influence of milling direction and cutting direction using a ball nose end mill on roughness of complex surfaces obtained during milling of AISI P20 steel. For this purpose, a convex surface was analyzed in three different angles (85º, 45º and 5º) of the workpiece in order to verify the influence of the cutting effective diameter on the surface machined. Tests were carried out, changing the cutting speed (225, 250, 275 and 300 m/min), the milling direction (up milling and down milling) and the cutting direction (ascendant and descendant). The depth of cut, the feed per edge and the machining width were kept constant, 1.5 mm, 0.1 mm/edge and 0.3 mm, respectively. Increasing cutting speed presented little importance on machined surface roughness. However, the effective cutting diameter significantly influenced the roughness and characteristics of the surfaces obtained.
Palavras-chave: complex surface; roughness; milling; AISI P20 steel